It is the perfect storm, with Bale warning that the PM had to find a way to appease all MPs in her party or face severe political consequences.

"If she can't postpone a vote on a customs union or force Tory Europhiles into line on it, and she feels obliged to negotiate according to that mandate, then the hard Brexiteers may decide it's time to make a move and ditch her for someone more to their liking, presuming they think they can find that person," Bale said.

And with so many issues within her own party, there are concerns that the negotiations are becoming increasingly harder by the day, before they even reach the real negotiating table in Brussels.

Bale admitted that "where there's a will there's a way", but with so much division within the Conservative party, the talks may eventually become impassable.

Theresa May will give a speech on Friday (2 March), outlining the path that her cabinet has agreed for Brexit, but the battle looks set to only intensify.